By Team Hypomnema · Cryptography & authentication
Generate counter-based one-time codes from a Base32 secret.
Use the guide alongside the working tool.
Open HOTP Counter Code Generator →Working local example
Use Try sample in the tool to load a labeled demonstration.Generate counter-based one-time codes from a Base32 secret.
Prepare the right input
Enter a Base32 secret and an unsigned counter.
Choose six or eight digits and generate the current code.
Review before using the result
Advance the counter explicitly when your service expects it.
RFC 4226 HMAC-SHA1. No account synchronization, secret backup or automatic counter advancement. Server and client counters must stay aligned.
Privacy and trust boundaries
Inputs remain in this browser. No online reputation, account, DNS or remote key lookup is performed. A static inspection is not a security certification.
Use the sample to learn the workflow. Clear sensitive input after use; private exports and clipboard contents require careful handling.
Ready to apply this workflow?
Try HOTP Counter Code Generator →Explore a related workflow
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Keep your original files and review the result. Found unclear instructions? Contact Team Hypomnema.